<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title></title>
    <style>
        header,
        footer {
            height: 50px;
            background: #ccc;
        }

        .wrapper {
            position: relative;
        }

        .main {
            height: 200px;
            margin: 0 100px;
            background: blue;
        }

        .left,
        .right {
            width: 100px;
            height: 200px;
            position: absolute;
            top: 0;
            background: red;
        }

        .left {
            left: 0;
        }

        .right {
            right: 0;
        }
    </style>
</head>

<body>
    <header>header</header>
    <section class="wrapper">
        <section class="col main">main</section>
        <aside class="col left">left</aside>
        <aside class="col right">right</aside>
    </section>
    <footer>footer</footer>
</body>

</html>